But can we use the word net charges on subatomic particles such as protons and neutrons and also electrons !?
A proton has a net charge of 2/3e+ 2/3e- ⅓e= +1e (since it is made of quarks)
A neutron has a net charge of 0 (the same as a proton but the "sum" is zero)
An electron (it's not made up of any quarks according to the theory but I assume we can use say +0e - 1e = -1e.